8-22-12 Please have the following on your desk: Name Tag Lined paper – write your heading in the top right hand corner. Pencil Pre-Algebra book Math Letter signed slip

CHAPTER 1 1-1: Variables AND Expressions p.4

VARIABLES AND EXPRESSIONS VARIABLE: a letter that represents a number in an algebraic expression. Examples: c y x a 3

VARIABLES AND EXPRESSIONS VARIABLE: a letter that represents a number in an algebraic expression. Examples: c y x a NUMERICAL EXPRESSION: an expression with only numbers. Examples: 4 + 9 18 – 32 4

VARIABLES AND EXPRESSIONS VARIABLE: a letter that represents a number in an algebraic expression. Examples: c y x a NUMERICAL EXPRESSION: an expression with only numbers. Examples: 4 + 9 18 – 32 VARIABLE EXPRESSION: an expression with variables in it. Examples: 8 + r 3y 6ab – 4d 5

EXAMPLES 50 – 5 Numerical expression because there are only numbers. c – 5 Variable expression because there is a variable.

Writing Variable Expressions Write an expression for the following: The number of months in 2 years 2 (12) The number of cents in 6 dimes 6 (10)

TRY THIS Identify as a numerical expression or variable expression: 100(6) D + 43 – 9

TRY THIS Identify as a numerical expression or variable expression: 100 (6) D + 43 – 9 Variable expression Numeric expression

TRY THIS Write an expression for the number of eggs in 5 dozen Write an expression for the number of feet in r yards

TRY THIS Write an expression for the number of eggs in 5 dozen Write an expression for the number of feet in r yards 5 (12) 3r

Agenda: 8-22-12 P. 6-7 #11-35 odd due Friday. Return Math letter

Please have out the following: 8-24-12 Please have out the following: Math book PP. 6/7 HW Red pen Multiplication Race (if not turned in earlier this week)

Fruit for Thought due Tuesday. Multiplication Race by Tuesday. Agenda 8-24-12 Fruit for Thought due Tuesday. Multiplication Race by Tuesday.